TS-100 is an attractive option if you want a decent and small iron. It can also be run from a battery pack (anything between 12Vdc and 24Vdc) and has quite a punch (80W). Disadvantage of these is that there are not many different tips available and the tips stick quite far out the handle.
If I had to buy a new Iron now though, it would be one of the T12 clones from Ali, and I would probably cobble it together from parts. The control board costs around EUR 18. The handle with silicone cord is between EUR 8 and EUR 25 (The cheapest versions are crap, don't buy those).
The power supply (24Vdc) is another EUR20 or so, but you may already have a suitable power supply. If you have a "standard" 30V 3A power supply, you may even opt for grafting in a small SMPS board for the soldering iron, or make a plug for the "raw" output voltage, and put the SMPS in a small box with the solder iron control PCB. Or just put 2 12Vdc bricks in series.
The advantages of the T12 is that there are many tips available. You could for example opt for buying a bunch of cheap ones, and replacing the ones you use often and wear out for higher quality versions. Another advantage is that the distance from your fingers to the tip is quite short, which gives you more control during positioning.
Both the T12 and TS100 have quick exchange tips which is quite handy. They both also have (adjustable) sleep and power off modes. Automatically reducing the tip temperature after some time of not using it, can significantly prolong the life of the tips. They also both use a STM32 and sourcecode is on github. So if you don't like some feature, it's quite doable to adjust the firmware and flash the thing.
If you work a lot with SMT, it is very handy to have two irons around. That way you can heat both sides of a resistor or capacitor to remove it from a PCB. And you also have redundancy. If one iron crops out for some reason you still have the other.